function DynamicOptionList(){if(arguments.length<2){alert("Not enough arguments in DynamicOptionList()");}
this.target=arguments[0];this.dependencies=new Array();for(var i=1;i<arguments.length;i++){this.dependencies[this.dependencies.length]=arguments[i];}
this.form=null;this.dependentValues=new Object();this.defaultValues=new Object();this.options=new Object();this.delimiter="|";this.longestString="";this.numberOfOptions=0;this.addOptions=DynamicOptionList_addOptions;this.populate=DynamicOptionList_populate;this.setDelimiter=DynamicOptionList_setDelimiter;this.setDefaultOption=DynamicOptionList_setDefaultOption;this.printOptions=DynamicOptionList_printOptions;this.init=DynamicOptionList_init;}
function DynamicOptionList_setDelimiter(val){this.delimiter=val;}
function DynamicOptionList_setDefaultOption(condition,val){this.defaultValues[condition]=val;}
function DynamicOptionList_init(theform){this.form=theform;this.populate();}
function DynamicOptionList_addOptions(dependentValue){if(typeof this.options[dependentValue]!="object"){this.options[dependentValue]=new Array();}
for(var i=1;i<arguments.length;i+=2){if(arguments[i].length>this.longestString.length){this.longestString=arguments[i];}
this.numberOfOptions++;this.options[dependentValue][this.options[dependentValue].length]=arguments[i];this.options[dependentValue][this.options[dependentValue].length]=arguments[i+1];}}
function DynamicOptionList_printOptions(){if((navigator.appName=='Netscape')&&(parseInt(navigator.appVersion)<=4)){var ret="";for(var i=0;i<this.numberOfOptions;i++){ret+="<OPTION>";}
ret+="<OPTION>"
for(var i=0;i<this.longestString.length;i++){ret+="_";}
document.writeln(ret);}}
function DynamicOptionList_populate(){var theform=this.form;var i,j,obj,obj2;this.dependentValues=new Object;var dependentValuesInitialized=false;for(i=0;i<this.dependencies.length;i++){var sel=theform[this.dependencies[i]];var selName=sel.name;if(!dependentValuesInitialized){dependentValuesInitialized=true;for(j=0;j<sel.options.length;j++){if(sel.options[j].selected){this.dependentValues[sel.options[j].value]=true;}}}
else{var tmpList=new Object();var newList=new Object();for(j=0;j<sel.options.length;j++){if(sel.options[j].selected){tmpList[sel.options[j].value]=true;}}
for(obj in this.dependentValues){for(obj2 in tmpList){newList[obj+this.delimiter+obj2]=true;}}
this.dependentValues=newList;}}
var targetSel=theform[this.target];var targetSelected=new Object();for(i=0;i<targetSel.options.length;i++){if(targetSel.options[i].selected){targetSelected[targetSel.options[i].value]=true;}}
targetSel.options.length=0;for(i in this.dependentValues){if(typeof this.options[i]=="object"){var o=this.options[i];for(j=0;j<o.length;j+=2){var text=o[j];var val=o[j+1];targetSel.options[targetSel.options.length]=new Option(text,val,false,false);if(this.defaultValues[i]==val){targetSelected[val]=true;}}}}
targetSel.selectedIndex=-1;for(i=0;i<targetSel.options.length;i++){if(targetSelected[targetSel.options[i].value]!=null&&targetSelected[targetSel.options[i].value]==true){targetSel.options[i].selected=true;}}}